LOL man you got it mixed up,the right lat is all fine.Look how big and thick it is.
The left one is the smaller one.The shape of the right on is caused by the HUGE amount of muscle he have.
So it just pop out of the shoulder width lines,while his left lat dont.Dorian and a few others had the same look to their lats.
At first I thought that was a stupid point but I have to admit that if you slow down the footage his right lat "hangs" as it normally should, causing it to look like a hole where it is inserted where as the left lat lacks that. I don't know whether that has always been the case but it is extremely obvious when he goes into standing relaxed just after getting his wig off.
That being said, the "hole" is there. Which is my point - it is not a photoshop, not that it is his problem. I'm well aware of the fact that from the back it is clear it is the left lat that is smaller. The hole is definitely strange though, but as I say it almost looks like it is created by the fact that lat extends out further, coming back in at insertion.